Table 2 Incidence of vitamin D deficiency in second study according to baseline obesity and incidence of obesity in third study according to vitamin D deficiency in second study

From: Hypovitaminosis D and incidence of obesity: a prospective study

Risk of vitamin D deficiency (20 ng/ml) in second study
  95% confidence interval P-value
  OR Lower Upper  
BMI at baseline
30 0.98 0.69 1.40 0.93
 <30 1(RC)    
Weight difference between baseline and second study 0.993 0.961 1.025 0.65
Obesity development between baseline and second study 0.80 0.48 1.33 0.39
Risk of developing obesity between second and third study
  OR Lower Upper  
25-hydroxyvitamin D (ng/ml)
 >17 1(RC)    
17 2.35 1.03 5.34 0.04
Risk of weight increase higher than 3.7 kg (75th percentile a ) between second and third study
25-hydroxyvitamin D (ng/ml)
 >17 1(RC)    
17 2.37 1.23 4.58 0.01
  1. Abbreviations: BMI: body mass index, RC, reference criterion.
  2. Regression logistic model. Model adjusted for age, sex, season, iPTH and the presence of diabetes.
  3. First study: 1996–1998, second study: 2002–2004 and third study: 2005–2007.
  4. a3.7 kg: 75th percentile of the weight gain distribution between the second and third study in non-obese subjects of second study.